Title:
Hollow inclosed float
United States Patent 1469647


Inventors:
Eduard, Ruegger
Application Number:
US35450720A
Publication Date:
10/02/1923
Filing Date:
01/27/1920
Assignee:
Eduard, Ruegger
Primary Class:
Other Classes:
137/398, 137/434
International Classes:
F25B41/06
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